The Terror

Jared Harris portrays Captain Francis Crozier, the seasoned captain of HMS Terror. Captain Crozier is a skilled seaman who struggles with his internal demons while leading his crew through the treacherous Arctic journey.

Ciarán Hinds portrays Sir John Franklin, the commanding officer of the expedition and captain of HMS Erebus. Sir Franklin is determined to succeed in finding the Northwest Passage, even if it means taking risky decisions.

Tobias Menzies plays Captain James Fitzjames, a high-ranking naval officer aboard HMS Erebus. Captain Fitzjames is ambitious, charismatic, and dedicated to the mission, but his priorities may clash with the safety of the crew.

Paul Ready portrays Doctor Henry Goodsir, the ship's surgeon and naturalist. Dr. Goodsir is a compassionate and intelligent individual who must grapple with the horrors of their situation while trying to maintain hope.

Adam Nagaitis plays Cornelius Hickey, a young Able Seaman aboard HMS Terror. Hickey is ambitious and manipulative, willing to use any means necessary to improve his own position within the crew.

Nive Nielsen portrays Lady Silence, also known as Silna. She is an Inuit woman who becomes entangled with the crew of the expedition. Lady Silence is shrouded in mystery and possesses unique knowledge of the Arctic landscape.

Ian Hart plays Thomas Blanky, a seasoned and loyal sailor aboard HMS Terror. Blanky is a trusted friend to Captain Crozier and an indispensable member of the crew, using his experience to navigate the challenges they face.

George Takei portrays Nobuhiro Yamato, also known as Yamato-san. Yamato is a well-respected elder of the local Inuit community, providing valuable guidance and insights to those aboard the ships.